Some recent changes made by Microsoft in how an Exchange Online mailbox is treated when an Office 365 license is removed from their owner’s account caused chaos for the account provisioning system of a large U.S. university. The changes actually make a lot of sense, but it’s bad when Microsoft makes changes like this without warning anyone. https://www.petri.com/exchange-online-office365-license
Interesting. I think one of the big challenges for Microsoft is knowing which changes to communicate, and which not to. A changelog of every single thing that happens is obviously not feasible (or probably desired) so a good balance must be struck.
The issue you desccribe is definitely something that should have been communicated.